import turtle
turtle.screensize(400,300,"white")
pen=turtle.Turtle()
pen.penup()
pen.goto(0,90)
pen.pendown()
pen.begin_fill()
pen.fillcolor("white")
pen.circle(30,extent=360)
pen.end_fill()
pen.penup()
pen.goto(0,70)
pen.pendown()
pen.begin_fill()
pen.fillcolor("black")
pen.circle(30,extent=360)
